- Whether zolpidem is appropriate in pregnancy is an individual decision to make with the OB, midwife, or maternal-fetal-medicine specialist who knows your history.
- Several studies summarized by MotherToBaby have not found an increased chance of birth defects with zolpidem, though not every question has been fully studied.
- Findings on preterm birth and lower birth weight are mixed; some studies saw no effect, while others saw slightly higher chances that may be influenced by other factors.
- It is not known whether zolpidem changes the chance of miscarriage, and its effect on fertility has not been studied.
- Insomnia is common in pregnancy, and clinicians often try sleep-focused behavioral approaches first, but treating sleep problems still matters.
- Do not start or stop a sleep medicine on your own; MotherToBaby (1-866-626-6847) can answer questions about a specific exposure.
Sleep can become genuinely difficult during pregnancy, and if you already take a prescription sleep aid, or you are wondering whether one is an option, it is natural to ask what is known about its safety. Ambien is a common brand name for zolpidem, a prescription medicine for short-term insomnia. This article gathers what leading sources report so you can have a more informed conversation with the clinician who manages your pregnancy. It is general education only and is not a substitute for that conversation.
What zolpidem is and what it treats
Zolpidem is a sedative-hypnotic medicine used to help people fall asleep, and sometimes stay asleep, when insomnia is a problem. It belongs to a group sometimes called hypnotic benzodiazepine receptor agonists, or “Z-drugs.” Although it is not a benzodiazepine itself, it acts on some of the same calming pathways in the brain. It is generally intended for short-term use, and it is available in immediate-release, extended-release, and other formulations. Because it changes alertness and can cause next-day drowsiness, it is a medicine that clinicians prescribe and monitor rather than one to adjust on your own.
What the guidance says about pregnancy
The most detailed plain-language summary comes from MotherToBaby, a service of the non-profit Organization of Teratology Information Specialists that reviews the published research on exposures in pregnancy.
Birth defects
MotherToBaby reports that several studies have not found an increased chance of birth defects when zolpidem is used in pregnancy. For context, about 3 in 100 babies in the general population are born with a birth defect, so some baseline chance always exists regardless of any medicine. The reassurance here is meaningful but not the same as a guarantee, which is one reason these decisions are individualized.
Preterm birth and birth weight
Here the research is less consistent. According to MotherToBaby, some studies have not found that zolpidem greatly increases the chance of problems such as preterm delivery (birth before 37 weeks) or low birth weight, while other studies have found that people who took zolpidem were slightly more likely to deliver early or to have smaller babies than those who did not. An important caveat is that these studies do not always account for other factors, such as underlying insomnia, stress, other medicines, or smoking, any of which could contribute to the results. In other words, it can be hard to separate the medicine from the reasons someone is taking it.
Miscarriage and fertility
MotherToBaby states that it is not known whether zolpidem can increase the chance of miscarriage, and that studies have not been done on whether it makes it harder to become pregnant. When data are simply missing, the honest answer is uncertainty, and that uncertainty is best discussed with your own clinician.
A note on old drug “categories”
You may come across the old FDA A/B/C/D/X pregnancy letter categories in older articles or leaflets. Those letter grades have been retired. The FDA now uses a narrative labeling system, sometimes called the Pregnancy and Lactation Labeling Rule (PLLR), which summarizes the actual evidence rather than assigning a single letter. If you see a letter grade quoted for zolpidem, treat it as outdated and rely on current guidance and your clinician instead.
The other side: untreated sleep problems matter too
Caution about any medicine does not mean that poor sleep should simply be endured. Persistent insomnia can affect mood, daytime functioning, and overall wellbeing, and it deserves attention. For many people in pregnancy, clinicians first suggest non-medicine approaches, such as improved sleep routines, addressing heartburn or restless legs, and cognitive behavioral therapy for insomnia (CBT-I), which is often effective and carries no fetal exposure. If a medicine is still needed, the goal is a thoughtful choice made with your care team, not going without help. That balance, between the medicine and the condition it treats, is exactly why this belongs in a conversation with your clinician.
Breastfeeding
MotherToBaby reports that zolpidem passes into breast milk in small amounts, and that a study measuring milk a few hours after a dose found only small amounts, with no problems reported in the babies. It still suggests watching a nursing baby for excessive sleepiness, poor feeding or weight gain, low muscle tone, or slow breathing, and mentioning any concerns to your clinician. As with pregnancy, the right approach depends on your baby, so confirm specifics with your provider.
Do not start or stop on your own
Two principles are worth holding onto. First, do not start zolpidem in pregnancy on your own, even if it is left over from before or offered by someone else; ask your OB or midwife what is appropriate for you. Second, if zolpidem was prescribed to you, do not simply stop it abruptly without talking to the prescriber, because the safest plan depends on why it was started and how long you have taken it. The right answer is individualized and can depend on how far along you are, your health history, and the reason for the medicine.
When to call your OB or a specialist
Reach out to your obstetric provider if you are pregnant or planning pregnancy and take zolpidem, if insomnia is significantly affecting your daily life or mood, or if you have already taken it and are worried. If you have a complex situation, your provider may involve a maternal-fetal-medicine specialist. For questions about a specific medication exposure in pregnancy or breastfeeding, you can call MotherToBaby at 1-866-626-6847, a free service. If sleeplessness comes with thoughts of self-harm or a mental-health crisis, call or text 988 at any time.
Frequently asked questions
Is it ever okay to take Ambien while pregnant? Sometimes, but only when your own clinician judges it appropriate for your situation. Several studies summarized by MotherToBaby have not linked zolpidem to a higher chance of birth defects, but the decision is individualized and other options are often tried first.
I took zolpidem before I knew I was pregnant. Should I worry? Try not to panic. MotherToBaby reports that studies have not found an increased chance of birth defects with zolpidem. Let your OB know what you took and when, and ask any follow-up questions there or through MotherToBaby.
Does zolpidem cause miscarriage? MotherToBaby states this is not known, because the necessary studies have not been done. Uncertainty is a reason to discuss your specific situation with your clinician rather than to assume the worst.
What can help me sleep instead? Clinicians often start with non-medicine approaches such as better sleep routines, treating heartburn or restless legs, and cognitive behavioral therapy for insomnia (CBT-I). Ask your provider which options fit you.
Will my baby have withdrawal or be sleepy at birth? This depends on the medicine, the dose, and the timing near delivery, and the published data are limited. This is an important question to raise with your OB and, if relevant, the team caring for your newborn.
Can I take zolpidem while breastfeeding? MotherToBaby notes only small amounts reach breast milk and no problems were reported in a small study, while suggesting you watch the baby for excessive sleepiness or feeding changes. Confirm with your clinician, especially for a newborn.
This article is general education, not medical advice, and must not be used to start, stop, adjust, or taper any medication on your own. Suddenly stopping some medicines can be dangerous. Always work with the prescriber who manages your care. In an emergency call 911; for mental-health crisis call or text 988.
Sources
- MotherToBaby (Organization of Teratology Information Specialists) — Zolpidem (Ambien) fact sheet.
- U.S. Food and Drug Administration — zolpidem (Ambien) prescribing information.
- MedlinePlus, U.S. National Library of Medicine — zolpidem consumer drug information.